MQ-7 Sensitive Detector Gas Sensor for detecting CO Gas for Arduino
This is a simple to use Carbon Monoxide (CO) sensor, suitable for sensing CO concentrations in the air. The MQ-7 can detect CO-gas concentrations anywhere from 20 to 2000ppm.
This sensor has a high sensitivity and fast response time. The sensor's output is an analog resistance. The drive circuit is very simple; all you need to do is power the heater coil with 5V, add a load resistance, and connect the output to an ADC.
The main chips: the LM393, the MQ-7 CO sensor
The working voltage: DC 5 V
1: Signal output instructions.
2: Dual signal output (analog output, and TTL level output)
3: The effective signal of TTL output is low level . (when Output low level ,the signal light on.can directly connected to the MCU)
4: Analog output 0 to 5V voltage, the higher the concentration ,the higher the voltage.
5: Has a high sensitivity and good selectivity to carbon monoxide .
6: Long life and reliable stability
7: Size: 32mm x22mm x27mm
For the household or environment detection carbon monoxide detection devices. fit for the detection of carbon monoxide and town gas.